:root{
  --navy:#16325B; --navy-deep:#0F2347; --blue:#2563EB; --blue-dark:#1D4ED8;
  --orange:#F97316; --orange-dark:#EA580C;
  --bg:#F5F9FF; --bg-alt:#EBF3FF; --line:#E2EAF5;
  --ink:#1E293B; --body:#475569; --muted:#64748B;
  --radius:16px; --wrap:1120px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:#fff;color:var(--ink);
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  font-size:17px;line-height:1.65;padding-bottom:64px}
@media(min-width:900px){body{padding-bottom:0}}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{color:var(--blue-dark);text-decoration:underline}
:focus-visible{outline:3px solid var(--orange);outline-offset:2px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:8px;top:8px;z-index:200;background:#fff;padding:10px 14px;border-radius:8px}

/* nav */
.nav{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:62px}
.nav-logo img{height:34px;width:auto}
.nav-links{display:none}
.nav-links a{color:#334155;font-size:14.5px;font-weight:600}
.nav-links a.on{color:var(--blue)}
.nav-right{display:flex;align-items:center;gap:10px}
.nav-tel{display:none;font-weight:700;color:var(--navy)}
.nav-toggle{display:inline-flex;flex-direction:column;justify-content:center;gap:4px;
  width:42px;height:38px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;padding:0 9px}
.nav-toggle span{display:block;height:2px;background:var(--navy);border-radius:2px}
@media(min-width:1024px){
  .nav-links{display:flex;flex-wrap:wrap;gap:16px;justify-content:flex-end;flex:1;margin:0 18px}
  .nav-tel{display:inline}
  .nav-toggle{display:none}
}
.nav.open .nav-links{display:flex;flex-direction:column;gap:0;position:absolute;left:0;right:0;top:62px;
  background:#fff;border-bottom:1px solid var(--line);padding:6px 20px 14px;box-shadow:0 18px 30px -20px rgba(15,35,71,.4)}
.nav.open .nav-links a{padding:11px 0;border-bottom:1px solid var(--line);font-size:16px}

/* buttons */
.btn{display:inline-block;padding:13px 22px;border-radius:14px;font-weight:700;font-size:15px;text-align:center;
  transition:background-color .15s,transform .15s}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-sm{padding:9px 15px;font-size:14px;border-radius:12px}
.btn-orange{background:var(--orange);color:#fff;box-shadow:0 4px 14px rgba(249,115,22,.35)}
.btn-orange:hover{background:var(--orange-dark);color:#fff}
.btn-outline{background:#fff;color:var(--blue);border:2px solid var(--blue)}
.btn-outline:hover{color:var(--blue-dark)}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border:1.5px solid rgba(255,255,255,.6)}
.btn-ghost:hover{background:rgba(255,255,255,.24);color:#fff}

/* hero */
.phero{background:linear-gradient(135deg,#16325B 0%,#1E4D8C 50%,#2563EB 100%);color:#fff;padding:44px 0 48px}
.phero-inner{display:grid;gap:26px}
.phero.has-img .phero-inner{grid-template-columns:1fr}
@media(min-width:900px){.phero{padding:56px 0 60px}
  .phero.has-img .phero-inner{grid-template-columns:1.1fr .9fr;align-items:center;gap:40px}}
.eyebrow{margin:0 0 10px;font-size:12px;font-weight:800;letter-spacing:2px;color:#FDBA74;text-transform:uppercase}
.phero h1{margin:0;font-size:30px;line-height:1.18;letter-spacing:-.02em;font-weight:800}
@media(min-width:900px){.phero h1{font-size:42px}}
.phero-sub{margin:14px 0 0;color:#D9E8FF;font-size:17px;max-width:60ch}
.phero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.phero-img img{border-radius:20px;width:100%;box-shadow:0 28px 50px -20px rgba(8,20,40,.65)}

/* breadcrumbs */
.crumbs{background:var(--bg);border-bottom:1px solid var(--line);font-size:13.5px;color:var(--muted)}
.crumbs .wrap{padding-top:10px;padding-bottom:10px;overflow-x:auto;white-space:nowrap}
.crumbs i{font-style:normal;padding:0 8px;color:#94A3B8}
.crumbs span{color:var(--ink);font-weight:600}

/* main */
.main{padding:34px 20px 56px;max-width:960px}
.main h2{font-size:24px;line-height:1.25;color:var(--navy);margin:34px 0 12px;font-weight:800;letter-spacing:-.01em}
.main h3{font-size:19px;color:var(--navy);margin:24px 0 8px;font-weight:700}
.main p,.main li{color:var(--body)}
.main ul,.main ol{padding-left:22px}
.main li{margin:6px 0}
.main strong{color:var(--ink)}
.lead{font-size:18px}
.qa{background:linear-gradient(90deg,var(--bg-alt) 0%,#fff 100%);border-left:4px solid var(--blue);
  border-radius:0 14px 14px 0;padding:16px 18px;margin:0 0 26px;color:var(--ink)}
.qa strong{color:var(--navy)}
.note{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:14px 16px;font-size:15.5px}
.note strong{color:var(--navy)}
figure{margin:22px 0}
figure img{border-radius:18px;width:100%}
figcaption{font-size:13.5px;color:var(--muted);margin-top:8px}

/* tables */
.tbl{overflow-x:auto;margin:18px 0;border:1px solid var(--line);border-radius:14px}
table{border-collapse:collapse;width:100%;font-size:15.5px;min-width:520px}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line)}
th{background:var(--bg);color:var(--navy);font-weight:700;font-size:14px}
tbody tr:last-child td{border-bottom:0}
td strong{color:var(--navy)}

/* cards */
.grid-2,.grid-3,.grid-4{display:grid;gap:16px;margin:20px 0}
.grid-2{grid-template-columns:1fr}
.grid-3{grid-template-columns:1fr}
.grid-4{grid-template-columns:1fr 1fr}
@media(min-width:640px){.grid-2{grid-template-columns:1fr 1fr}.grid-3{grid-template-columns:1fr 1fr}}
@media(min-width:900px){.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}}
.card{display:block;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;
  color:inherit;transition:box-shadow .15s,border-color .15s}
.card:hover{text-decoration:none;border-color:#C7D9F5;box-shadow:0 14px 28px -18px rgba(15,35,71,.5)}
.card img{aspect-ratio:3/2;object-fit:cover;width:100%;background:var(--bg)}
.card-body{padding:14px 16px 16px}
.card h3{margin:0 0 6px;font-size:17px;color:var(--navy);font-weight:700}
.card p{margin:0;font-size:14.5px;color:var(--body)}
.card-price{display:inline-block;margin-top:10px;font-weight:800;color:var(--navy)}
.card-tag{display:inline-block;background:var(--orange);color:#fff;font-size:11px;font-weight:800;
  letter-spacing:.5px;padding:3px 8px;border-radius:999px;margin-bottom:8px}

/* product page */
.pbuy{display:grid;gap:22px;margin-bottom:8px}
@media(min-width:820px){.pbuy{grid-template-columns:1fr 1fr;align-items:start;gap:32px}}
.pbuy img{border-radius:18px;width:100%}
.pprice{font-size:32px;font-weight:800;color:var(--navy);margin:0}
.pwas{font-size:16px;color:var(--muted);text-decoration:line-through;margin-left:10px;font-weight:600}
.pbuy ul{list-style:none;padding:0;margin:16px 0}
.pbuy ul li{padding-left:26px;position:relative;margin:9px 0}
.pbuy ul li::before{content:"";position:absolute;left:0;top:9px;width:14px;height:8px;
  border-left:3px solid #16A34A;border-bottom:3px solid #16A34A;transform:rotate(-45deg)}
.pbtns{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.specs th{width:44%}

/* faq */
.faq{margin-top:36px}
.faq details{border:1px solid var(--line);border-radius:14px;margin:10px 0;background:#fff}
.faq summary{cursor:pointer;padding:14px 16px;font-weight:700;color:var(--navy);list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--orange);font-weight:800}
.faq details[open] summary::after{content:"\2212"}
.faq .faq-a{padding:0 16px 15px;color:var(--body)}
.faq .faq-a p:first-child{margin-top:0}

/* cta band */
.ctaband{background:var(--navy);color:#fff;border-radius:20px;padding:28px 22px;margin:40px 0 10px;text-align:center}
.ctaband h2{color:#fff;margin:0 0 8px;font-size:22px}
.ctaband p{color:#CFE0FA;margin:0 auto;max-width:56ch}
.ctaband-btns{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:18px}

/* related */
.related ul{list-style:none;padding:0;display:grid;gap:8px;grid-template-columns:1fr}
@media(min-width:640px){.related ul{grid-template-columns:1fr 1fr}}
.related li{margin:0}
.related a{display:block;padding:11px 14px;border:1px solid var(--line);border-radius:12px;background:var(--bg);font-weight:600}
.related a:hover{text-decoration:none;border-color:#C7D9F5}
.updated{margin-top:34px;font-size:13.5px;color:var(--muted);border-top:1px solid var(--line);padding-top:14px}

/* tools */
.tool{border:1px solid var(--line);border-radius:18px;padding:18px;background:var(--bg)}
.tool fieldset{border:0;margin:0 0 18px;padding:0}
.tool legend{font-weight:800;color:var(--navy);margin-bottom:8px;padding:0}
.opt{display:block;background:#fff;border:1.5px solid var(--line);border-radius:12px;padding:12px 14px;margin:8px 0;cursor:pointer}
.opt input{margin-right:10px}
.opt:hover{border-color:#C7D9F5}
.opt.sel{border-color:var(--blue);background:var(--bg-alt)}
.result{background:#fff;border:2px solid var(--blue);border-radius:16px;padding:18px;margin-top:10px}
.result h3{margin-top:0}
.total{font-size:28px;font-weight:800;color:var(--navy)}
.calc-line{display:flex;justify-content:space-between;gap:14px;padding:9px 0;border-bottom:1px dashed var(--line)}
.calc-line:last-of-type{border-bottom:0}

/* footer */
.footer{background:var(--navy-deep);color:#C9DBF5;padding:44px 0 0;margin-top:50px;font-size:15px}
.foot-grid{display:grid;gap:26px;grid-template-columns:1fr}
@media(min-width:700px){.foot-grid{grid-template-columns:1fr 1fr}}
@media(min-width:980px){.foot-grid{grid-template-columns:1.3fr 1fr 1fr 1fr}}
.footer h3{color:#fff;font-size:15px;margin:0 0 10px;font-weight:800}
.footer p{margin:5px 0;color:#A9C4E8}
.footer ul{list-style:none;padding:0;margin:0}
.footer li{margin:7px 0}
.footer a{color:#C9DBF5}
.footer a:hover{color:#fff}
.foot-logo{display:inline-block;background:#fff;border-radius:10px;padding:6px 8px;margin-bottom:12px}
.foot-base{border-top:1px solid rgba(255,255,255,.12);margin-top:30px;padding-top:16px;padding-bottom:20px}
.foot-base p{font-size:13.5px;color:#8FAFD8}

/* sticky mobile bar */
.stickybar{position:fixed;left:0;right:0;bottom:0;z-index:120;display:flex;
  border-top:1px solid var(--line);background:#fff;box-shadow:0 -6px 20px -12px rgba(15,35,71,.5)}
.stickybar a{flex:1;text-align:center;padding:15px 8px;font-weight:800;font-size:15px}
.sb-call{background:var(--orange);color:#fff}
.sb-call:hover{color:#fff;text-decoration:none}
.sb-wa{background:#25D366;color:#fff}
.sb-wa:hover{color:#fff;text-decoration:none}
@media(min-width:900px){.stickybar{display:none}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}